Walid Mohamed Rashad Mohamed | Modern Science and Arts (MSA) university (original) (raw)

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Papers by Walid Mohamed Rashad Mohamed

Research paper thumbnail of The crested porcupine, Hystrix cristata (Linnaeus, 1758) in Misurata, Libya

Journal of ecology and the natural environment, Jul 31, 2007

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Research paper thumbnail of European Journal of Chemistry Journal homepage: www.eurjchem.com

Study on regioselective synthesis of bioactive bis‐spiropyrazolines using molecular orbital calcu... more Study on regioselective synthesis of bioactive bis‐spiropyrazolines using molecular orbital calculations

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Research paper thumbnail of The Effect of Thermal Cycling on Mechanical Behavior of U-10Mo Monolithic Mini-Plate

Volume 6B: Energy, 2016

Mini fuel plates used in Advanced Test Reactor (ATR) undergo five steps during the reator operati... more Mini fuel plates used in Advanced Test Reactor (ATR) undergo five steps during the reator operation: startup, ATR Cycle 146A, transition from Cycle 146A to 146B, ATR Cycle 146B, and shutdown. Although the overall irradiation behavior of U-10Mo fuel is expected to be similar to the reactors operating at comparable power levels, there is a concern regarding how variation in operation schedules (that is, how many start-ups and shut-downs could be inserted during the Cycle A and Cycle B) may affect the mechanical behavior of the fuel plate during operation. To investigate any potential effect of number of start-stop activities, we simulated the thermo-mechanical behavior of L1P756 mini-plate, one of fuel plates inserted in ATR under RERTR-12 irradiation conditions with various numbers of start-stop activities artificially added at different points of time in irradiation cycle. This paper reviews four cases by varying the number of thermal cycles. Finite Element (FE) analyses were perfor...

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Research paper thumbnail of COVID-19 impact on Surgical Training and Recovery Planning (COVID-STAR) - A cross-sectional observational study

International Journal of Surgery, 2021

Background The COVID-19 pandemic has resulted in significant changes to healthcare systems which ... more Background The COVID-19 pandemic has resulted in significant changes to healthcare systems which impact the delivery of surgical training. This study aimed to investigate the qualitative impact of COVID-19 on surgical training in the United Kingdom (UK) & Republic of Ireland (ROI) Methods This national, collaborative, cross-sectional study involving 13 surgical trainee associations distributed a pan-surgical specialty questionnaire on the impact of COVID-19 on surgical training over 4 weeks in May 2020. Various aspects of training were assessed. Results 810 completed responses were analysed (males=401, females=390) from all deaneries and training grades. The perceived negative overall impact of the pandemic on surgical training experience was significant. (Weighted average = 8.66). 41% of respondents (n=301) were redeployed with 74% redeployed >4 weeks. Complete loss of training was reported in elective operating (69.5%), outpatient activity (67.3%) and endoscopy (69.5%). A reduction of >50% was reported in emergency operating (48%) and completion of work-based assessments (WBAs) (46%). 3.3% (n= 17) of respondents reported plans to leave medicine altogether. Cancellations in study leave and regional teaching programmes without rescheduling were reported in 72% and 60% of the cohort respectively. Elective operative exposure and WBAs completion were the primary reported factors affecting potential trainee progression. Only 9% reported that they would definitely meet all required competencies. Conclusion COVID-19 has had a negative impact on surgical training across all grades and specialties, with implications for trainee progression, recruitment and retention of the surgical workforce. Further investigation of the long-term impact at a national level is required.

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Research paper thumbnail of Trends in sex-based differences in outcomes following coronary artery bypass grafting in the United States between 2004 and 2015

International Journal of Cardiology, 2020

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Research paper thumbnail of Incidence and predictors of postoperative ischemic stroke after coronary artery bypass grafting

International Journal of Clinical Practice, 2021

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Research paper thumbnail of Parametric Study of the Effect of Cross-Frames on the Behaviour of Composite Steel-Concrete Girders Curved in Plan and Constructed with Shoring

JES. Journal of Engineering Sciences, 2006

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Research paper thumbnail of Preoperative C-reactive protein as a predictor of postoperative acute kidney injury in patients undergoing coronary artery bypass grafting

Perfusion, 2020

C-reactive protein is a well-known marker of inflammation and may be preoperatively elevated in t... more C-reactive protein is a well-known marker of inflammation and may be preoperatively elevated in the absence of infection in adult cardiac surgery patients, indicating a baseline inflammatory process. We conducted a literature search to assess the available evidence on whether there is an association between preoperative C-reactive protein and acute kidney injury after coronary artery bypass grafting. Included only were observational studies which investigated this association. We excluded abstracts, case reports, animal studies and articles in languages other than English. Altogether, 199 papers were retrieved from the search strategy reported, of which 6 studies were included in the final review. The study types, publication details, patient groups and key results are tabulated. A qualitative assessment of these papers was conducted. We conclude that there is some evidence to support the association between high preoperative C-reactive protein level and postoperative acute kidney i...

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Research paper thumbnail of Effects of Plate Curvature on Thermo-Mechanical Performance of U-10Mo Monolithic Fuel Plates

Volume 6: Energy, Nov 11, 2019

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Research paper thumbnail of Consensus recommendations on balancing educational opportunities and service provision in surgical training: Association of Surgeons in Training Delphi qualitative study

International Journal of Surgery, 2020

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Research paper thumbnail of Is it safe and effective to reduce the target anticoagulation range for patients with mechanical prosthetic aortic valves?

Interactive CardioVascular and Thoracic Surgery, 2020

A best evidence topic in cardiac surgery was written according to a structured protocol. The ques... more A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was ‘Is it safe and effective to reduce the target anticoagulation range for patients with mechanical aortic valves?’ Altogether 922 papers were found using the reported search, of which 7 represented the best evidence to answer the clinical question. Only studies that compared high (target international normalized ratio 2–3) versus low (target international normalized ratio <2–3) intensity anticoagulation were included. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. We conclude that there is growing evidence for the reduction of the target anticoagulation range for patients with mechanical prosthetic aortic valves, especially bileaflet valves with presumed better haemodynamic properties. Several large randomized controlled trials and a meta-analysis have concluded th...

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Research paper thumbnail of The Collection of Ottoman Tobacco Pipes from Azov Museum-Reserve in Russia

Journal of the General Union of Arab Archaeologists, 2018

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Research paper thumbnail of Changes in the feeding behavior and habitat use of The Desert Hedgehog Paraechinus aethiopicus (Ehrenberg 1832), in Saudi Arabia

Authorea

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Research paper thumbnail of Employees' Outsourcing Perceptions and Satisfaction: The Case of Libya Oil Company

International Journal of Economics and Business Administration, 2019

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Research paper thumbnail of Approach to local thermodynamic equilibrium and the evolution to a glassy core following neutron/ion radiation impact

Philosophical Magazine, 2018

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Research paper thumbnail of Fuel Swelling and Creep Analysis for a MURR LEU U-10Mo Monolithic Plate

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Research paper thumbnail of Formability of a wrought Mg alloy evaluated by impression testing

Materials Science and Engineering: A, 2018

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Research paper thumbnail of Whole-genome comparison of high and low virulent Staphylococcus aureus isolates inducing implant-associated bone infections

International journal of medical microbiology : IJMM, 2018

Staphylococcus aureus can cause wide range of infections from simple soft skin infections to seve... more Staphylococcus aureus can cause wide range of infections from simple soft skin infections to severe endocarditis, bacteremia, osteomyelitis and implant associated bone infections (IABI). The focus of the present investigation was to study virulence properties of S. aureus isolates from acute and chronic IABI by means of their in vivo lethality, in vitro osteoblasts invasion, biofilm formation and subsequently whole genome comparison between high and low virulent strains. Application of insect infection model Galleria mellonella revealed high, intermediate and low virulence phenotypes of these clinical isolates, which showed good correlation with osteoblast invasion and biofilm formation assays. Comparative genomics of selected high (EDCC 5458) and low (EDCC 5464) virulent strains enabled the identification of molecular factors responsible for the development of acute and chronic IABI. Accordingly, the low virulent strain EDCC 5464 harbored point mutations resulting in frame shift mu...

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Research paper thumbnail of TEM and XAS investigation of fission gas behaviors in U-Mo alloy fuels through ion beam irradiation

Journal of Nuclear Materials, 2017

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Research paper thumbnail of TLR9 mediates S. aureus killing inside osteoblasts via induction of oxidative stress

BMC Microbiology, 2016

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Research paper thumbnail of The crested porcupine, Hystrix cristata (Linnaeus, 1758) in Misurata, Libya

Journal of ecology and the natural environment, Jul 31, 2007

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Research paper thumbnail of European Journal of Chemistry Journal homepage: www.eurjchem.com

Study on regioselective synthesis of bioactive bis‐spiropyrazolines using molecular orbital calcu... more Study on regioselective synthesis of bioactive bis‐spiropyrazolines using molecular orbital calculations

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Effect of Thermal Cycling on Mechanical Behavior of U-10Mo Monolithic Mini-Plate

Volume 6B: Energy, 2016

Mini fuel plates used in Advanced Test Reactor (ATR) undergo five steps during the reator operati... more Mini fuel plates used in Advanced Test Reactor (ATR) undergo five steps during the reator operation: startup, ATR Cycle 146A, transition from Cycle 146A to 146B, ATR Cycle 146B, and shutdown. Although the overall irradiation behavior of U-10Mo fuel is expected to be similar to the reactors operating at comparable power levels, there is a concern regarding how variation in operation schedules (that is, how many start-ups and shut-downs could be inserted during the Cycle A and Cycle B) may affect the mechanical behavior of the fuel plate during operation. To investigate any potential effect of number of start-stop activities, we simulated the thermo-mechanical behavior of L1P756 mini-plate, one of fuel plates inserted in ATR under RERTR-12 irradiation conditions with various numbers of start-stop activities artificially added at different points of time in irradiation cycle. This paper reviews four cases by varying the number of thermal cycles. Finite Element (FE) analyses were perfor...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of COVID-19 impact on Surgical Training and Recovery Planning (COVID-STAR) - A cross-sectional observational study

International Journal of Surgery, 2021

Background The COVID-19 pandemic has resulted in significant changes to healthcare systems which ... more Background The COVID-19 pandemic has resulted in significant changes to healthcare systems which impact the delivery of surgical training. This study aimed to investigate the qualitative impact of COVID-19 on surgical training in the United Kingdom (UK) & Republic of Ireland (ROI) Methods This national, collaborative, cross-sectional study involving 13 surgical trainee associations distributed a pan-surgical specialty questionnaire on the impact of COVID-19 on surgical training over 4 weeks in May 2020. Various aspects of training were assessed. Results 810 completed responses were analysed (males=401, females=390) from all deaneries and training grades. The perceived negative overall impact of the pandemic on surgical training experience was significant. (Weighted average = 8.66). 41% of respondents (n=301) were redeployed with 74% redeployed >4 weeks. Complete loss of training was reported in elective operating (69.5%), outpatient activity (67.3%) and endoscopy (69.5%). A reduction of >50% was reported in emergency operating (48%) and completion of work-based assessments (WBAs) (46%). 3.3% (n= 17) of respondents reported plans to leave medicine altogether. Cancellations in study leave and regional teaching programmes without rescheduling were reported in 72% and 60% of the cohort respectively. Elective operative exposure and WBAs completion were the primary reported factors affecting potential trainee progression. Only 9% reported that they would definitely meet all required competencies. Conclusion COVID-19 has had a negative impact on surgical training across all grades and specialties, with implications for trainee progression, recruitment and retention of the surgical workforce. Further investigation of the long-term impact at a national level is required.

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Research paper thumbnail of Trends in sex-based differences in outcomes following coronary artery bypass grafting in the United States between 2004 and 2015

International Journal of Cardiology, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Incidence and predictors of postoperative ischemic stroke after coronary artery bypass grafting

International Journal of Clinical Practice, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Parametric Study of the Effect of Cross-Frames on the Behaviour of Composite Steel-Concrete Girders Curved in Plan and Constructed with Shoring

JES. Journal of Engineering Sciences, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Preoperative C-reactive protein as a predictor of postoperative acute kidney injury in patients undergoing coronary artery bypass grafting

Perfusion, 2020

C-reactive protein is a well-known marker of inflammation and may be preoperatively elevated in t... more C-reactive protein is a well-known marker of inflammation and may be preoperatively elevated in the absence of infection in adult cardiac surgery patients, indicating a baseline inflammatory process. We conducted a literature search to assess the available evidence on whether there is an association between preoperative C-reactive protein and acute kidney injury after coronary artery bypass grafting. Included only were observational studies which investigated this association. We excluded abstracts, case reports, animal studies and articles in languages other than English. Altogether, 199 papers were retrieved from the search strategy reported, of which 6 studies were included in the final review. The study types, publication details, patient groups and key results are tabulated. A qualitative assessment of these papers was conducted. We conclude that there is some evidence to support the association between high preoperative C-reactive protein level and postoperative acute kidney i...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effects of Plate Curvature on Thermo-Mechanical Performance of U-10Mo Monolithic Fuel Plates

Volume 6: Energy, Nov 11, 2019

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Research paper thumbnail of Consensus recommendations on balancing educational opportunities and service provision in surgical training: Association of Surgeons in Training Delphi qualitative study

International Journal of Surgery, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Is it safe and effective to reduce the target anticoagulation range for patients with mechanical prosthetic aortic valves?

Interactive CardioVascular and Thoracic Surgery, 2020

A best evidence topic in cardiac surgery was written according to a structured protocol. The ques... more A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was ‘Is it safe and effective to reduce the target anticoagulation range for patients with mechanical aortic valves?’ Altogether 922 papers were found using the reported search, of which 7 represented the best evidence to answer the clinical question. Only studies that compared high (target international normalized ratio 2–3) versus low (target international normalized ratio <2–3) intensity anticoagulation were included. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. We conclude that there is growing evidence for the reduction of the target anticoagulation range for patients with mechanical prosthetic aortic valves, especially bileaflet valves with presumed better haemodynamic properties. Several large randomized controlled trials and a meta-analysis have concluded th...

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Research paper thumbnail of The Collection of Ottoman Tobacco Pipes from Azov Museum-Reserve in Russia

Journal of the General Union of Arab Archaeologists, 2018

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Research paper thumbnail of Changes in the feeding behavior and habitat use of The Desert Hedgehog Paraechinus aethiopicus (Ehrenberg 1832), in Saudi Arabia

Authorea

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Research paper thumbnail of Employees' Outsourcing Perceptions and Satisfaction: The Case of Libya Oil Company

International Journal of Economics and Business Administration, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Approach to local thermodynamic equilibrium and the evolution to a glassy core following neutron/ion radiation impact

Philosophical Magazine, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fuel Swelling and Creep Analysis for a MURR LEU U-10Mo Monolithic Plate

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Formability of a wrought Mg alloy evaluated by impression testing

Materials Science and Engineering: A, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Whole-genome comparison of high and low virulent Staphylococcus aureus isolates inducing implant-associated bone infections

International journal of medical microbiology : IJMM, 2018

Staphylococcus aureus can cause wide range of infections from simple soft skin infections to seve... more Staphylococcus aureus can cause wide range of infections from simple soft skin infections to severe endocarditis, bacteremia, osteomyelitis and implant associated bone infections (IABI). The focus of the present investigation was to study virulence properties of S. aureus isolates from acute and chronic IABI by means of their in vivo lethality, in vitro osteoblasts invasion, biofilm formation and subsequently whole genome comparison between high and low virulent strains. Application of insect infection model Galleria mellonella revealed high, intermediate and low virulence phenotypes of these clinical isolates, which showed good correlation with osteoblast invasion and biofilm formation assays. Comparative genomics of selected high (EDCC 5458) and low (EDCC 5464) virulent strains enabled the identification of molecular factors responsible for the development of acute and chronic IABI. Accordingly, the low virulent strain EDCC 5464 harbored point mutations resulting in frame shift mu...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of TEM and XAS investigation of fission gas behaviors in U-Mo alloy fuels through ion beam irradiation

Journal of Nuclear Materials, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of TLR9 mediates S. aureus killing inside osteoblasts via induction of oxidative stress

BMC Microbiology, 2016

Bookmarks Related papers MentionsView impact